SELECT 
  SQL_CALC_FOUND_ROWS products.product_id, 
  IF(
    shared_descr.product_id IS NOT NULL, 
    shared_descr.product, descr1.product
  ) as product, 
  companies.company as company_name, 
  products.product_type, 
  products.parent_product_id 
FROM 
  cscart_products as products 
  LEFT JOIN cscart_product_descriptions as descr1 ON descr1.product_id = products.product_id 
  AND descr1.lang_code = 'ru' 
  LEFT JOIN cscart_product_prices as prices ON prices.product_id = products.product_id 
  AND prices.lower_limit = 1 
  LEFT JOIN cscart_companies AS companies ON companies.company_id = products.company_id 
  INNER JOIN cscart_products_categories as products_categories ON products_categories.product_id = products.product_id 
  INNER JOIN cscart_categories ON cscart_categories.category_id = products_categories.category_id 
  AND (
    cscart_categories.usergroup_ids = '' 
    OR FIND_IN_SET(
      0, cscart_categories.usergroup_ids
    ) 
    OR FIND_IN_SET(
      1, cscart_categories.usergroup_ids
    )
  ) 
  AND cscart_categories.status IN ('A', 'H') 
  AND cscart_categories.storefront_id IN (0, 1) 
  LEFT JOIN cscart_ult_product_descriptions shared_descr ON shared_descr.product_id = products.product_id 
  AND shared_descr.company_id = 1 
  AND shared_descr.lang_code = 'ru' 
  LEFT JOIN cscart_images_links as img_links ON img_links.object_id = products.product_id 
  AND img_links.object_type = 'product' 
  AND img_links.type = 'M' 
  LEFT JOIN cscart_warehouses_sum_products_amount as war_sum_amount ON war_sum_amount.product_id = products.product_id 
  LEFT JOIN cscart_warehouses_destination_products_amount AS warehouses_destination_products_amount ON warehouses_destination_products_amount.product_id = products.product_id 
  AND warehouses_destination_products_amount.destination_id = 116 
  AND warehouses_destination_products_amount.storefront_id = 1 
  LEFT JOIN cscart_product_popularity as popularity ON popularity.product_id = products.product_id 
WHERE 
  1 
  AND cscart_categories.category_id IN (
    2, 21, 35, 38, 39, 3, 4, 77, 78, 79, 80, 81, 
    82, 83, 84, 85, 117, 118, 119, 125, 126, 
    132, 133, 134, 150, 154, 158, 167, 168, 
    170, 171, 172, 176, 183, 184, 185, 186, 
    190, 191, 192, 193, 199, 201, 204, 205, 
    217, 223, 224, 225, 227, 231, 232, 233, 
    237, 248, 250, 258, 259, 260, 261, 262, 
    270, 275, 279, 281, 285, 290, 296, 299, 
    395, 303, 308, 313, 315, 318, 319, 322, 
    326, 333, 334, 339, 342, 355, 359, 361, 
    362, 363, 364, 365, 366, 367, 368, 378
  ) 
  AND companies.status IN ('A') 
  AND (
    (
      CASE products.is_stock_split_by_warehouses WHEN 'Y' THEN warehouses_destination_products_amount.amount ELSE products.amount END
    ) > 0 
    OR products.tracking = 'D'
  ) 
  AND (
    products.usergroup_ids = '' 
    OR FIND_IN_SET(0, products.usergroup_ids) 
    OR FIND_IN_SET(1, products.usergroup_ids)
  ) 
  AND products.status IN ('A') 
  AND prices.usergroup_id IN (0, 0, 1) 
  AND products.company_id != 2 
  AND img_links.pair_id > 0 
  AND products.parent_product_id = 0 
GROUP BY 
  products.product_id 
ORDER BY 
  popularity.total desc, 
  products.product_id ASC 
LIMIT 
  80, 16

Query time 0.00882

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "65.68"
    },
    "ordering_operation": {
      "using_filesort": true,
      "grouping_operation": {
        "using_temporary_table": true,
        "using_filesort": false,
        "nested_loop": [
          {
            "table": {
              "table_name": "shared_descr",
              "access_type": "system",
              "possible_keys": [
                "PRIMARY",
                "product_id",
                "company_id"
              ],
              "rows_examined_per_scan": 0,
              "rows_produced_per_join": 1,
              "filtered": "0.00",
              "const_row_not_found": true,
              "cost_info": {
                "read_cost": "0.00",
                "eval_cost": "0.10",
                "prefix_cost": "0.00",
                "data_read_per_join": "4K"
              },
              "used_columns": [
                "product_id",
                "lang_code",
                "company_id",
                "product"
              ]
            }
          },
          {
            "table": {
              "table_name": "companies",
              "access_type": "range",
              "possible_keys": [
                "PRIMARY"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "company_id"
              ],
              "key_length": "4",
              "rows_examined_per_scan": 2,
              "rows_produced_per_join": 1,
              "filtered": "50.00",
              "index_condition": "(`test_uchur_k`.`companies`.`company_id` <> 2)",
              "cost_info": {
                "read_cost": "1.31",
                "eval_cost": "0.10",
                "prefix_cost": "1.41",
                "data_read_per_join": "6K"
              },
              "used_columns": [
                "company_id",
                "status",
                "company"
              ],
              "attached_condition": "(`test_uchur_k`.`companies`.`status` = 'A')"
            }
          },
          {
            "table": {
              "table_name": "products_categories",
              "access_type": "range",
              "possible_keys": [
                "PRIMARY",
                "pt"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "category_id"
              ],
              "key_length": "3",
              "rows_examined_per_scan": 182,
              "rows_produced_per_join": 182,
              "filtered": "100.00",
              "using_index": true,
              "using_join_buffer": "hash join",
              "cost_info": {
                "read_cost": "19.59",
                "eval_cost": "18.20",
                "prefix_cost": "39.20",
                "data_read_per_join": "2K"
              },
              "used_columns": [
                "product_id",
                "category_id"
              ],
              "attached_condition": "(`test_uchur_k`.`products_categories`.`category_id` in (2,21,35,38,39,3,4,77,78,79,80,81,82,83,84,85,117,118,119,125,126,132,133,134,150,154,158,167,168,170,171,172,176,183,184,185,186,190,191,192,193,199,201,204,205,217,223,224,225,227,231,232,233,237,248,250,258,259,260,261,262,270,275,279,281,285,290,296,299,395,303,308,313,315,318,319,322,326,333,334,339,342,355,359,361,362,363,364,365,366,367,368,378))"
            }
          },
          {
            "table": {
              "table_name": "cscart_categories",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "c_status",
                "p_category_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "category_id"
              ],
              "key_length": "3",
              "ref": [
                "test_uchur_k.products_categories.category_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 9,
              "filtered": "5.00",
              "cost_info": {
                "read_cost": "0.00",
                "eval_cost": "0.91",
                "prefix_cost": "57.40",
                "data_read_per_join": "48K"
              },
              "used_columns": [
                "category_id",
                "storefront_id",
                "usergroup_ids",
                "status"
              ],
              "attached_condition": "(((`test_uchur_k`.`cscart_categories`.`usergroup_ids` = '') or (0 <> find_in_set(0,`test_uchur_k`.`cscart_categories`.`usergroup_ids`)) or (0 <> find_in_set(1,`test_uchur_k`.`cscart_categories`.`usergroup_ids`))) and (`test_uchur_k`.`cscart_categories`.`status` in ('A','H')) and (`test_uchur_k`.`cscart_categories`.`storefront_id` in (0,1)))"
            }
          },
          {
            "table": {
              "table_name": "products",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "status",
                "idx_parent_product_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "test_uchur_k.products_categories.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "5.00",
              "cost_info": {
                "read_cost": "0.00",
                "eval_cost": "0.05",
                "prefix_cost": "58.31",
                "data_read_per_join": "4K"
              },
              "used_columns": [
                "product_id",
                "product_type",
                "status",
                "company_id",
                "amount",
                "usergroup_ids",
                "tracking",
                "parent_product_id",
                "is_stock_split_by_warehouses"
              ],
              "attached_condition": "((`test_uchur_k`.`products`.`company_id` = `test_uchur_k`.`companies`.`company_id`) and (`test_uchur_k`.`products`.`parent_product_id` = 0) and ((`test_uchur_k`.`products`.`usergroup_ids` = '') or (0 <> find_in_set(0,`test_uchur_k`.`products`.`usergroup_ids`)) or (0 <> find_in_set(1,`test_uchur_k`.`products`.`usergroup_ids`))) and (`test_uchur_k`.`products`.`status` = 'A'))"
            }
          },
          {
            "table": {
              "table_name": "descr1",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "product_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id",
                "lang_code"
              ],
              "key_length": "9",
              "ref": [
                "test_uchur_k.products_categories.product_id",
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.00",
                "eval_cost": "0.05",
                "prefix_cost": "58.36",
                "data_read_per_join": "2K"
              },
              "used_columns": [
                "product_id",
                "lang_code",
                "product"
              ]
            }
          },
          {
            "table": {
              "table_name": "prices",
              "access_type": "ref",
              "possible_keys": [
                "usergroup",
                "product_id",
                "lower_limit",
                "usergroup_id"
              ],
              "key": "product_id",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "test_uchur_k.products_categories.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "75.77",
              "cost_info": {
                "read_cost": "0.11",
                "eval_cost": "0.03",
                "prefix_cost": "58.52",
                "data_read_per_join": "8"
              },
              "used_columns": [
                "product_id",
                "lower_limit",
                "usergroup_id"
              ],
              "attached_condition": "((`test_uchur_k`.`prices`.`lower_limit` = 1) and (`test_uchur_k`.`prices`.`usergroup_id` in (0,0,1)))"
            }
          },
          {
            "table": {
              "table_name": "img_links",
              "access_type": "ref",
              "possible_keys": [
                "PRIMARY",
                "object_id"
              ],
              "key": "object_id",
              "used_key_parts": [
                "object_id",
                "object_type",
                "type"
              ],
              "key_length": "81",
              "ref": [
                "test_uchur_k.products_categories.product_id",
                "const",
                "const"
              ],
              "rows_examined_per_scan": 4,
              "rows_produced_per_join": 1,
              "filtered": "100.00",
              "index_condition": "(`test_uchur_k`.`img_links`.`object_id` = `test_uchur_k`.`products_categories`.`product_id`)",
              "cost_info": {
                "read_cost": "0.34",
                "eval_cost": "0.14",
                "prefix_cost": "59.00",
                "data_read_per_join": "132"
              },
              "used_columns": [
                "pair_id",
                "object_id",
                "object_type",
                "type"
              ],
              "attached_condition": "(`test_uchur_k`.`img_links`.`pair_id` > 0)"
            }
          },
          {
            "table": {
              "table_name": "war_sum_amount",
              "access_type": "ref",
              "possible_keys": [
                "PRIMARY"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "test_uchur_k.products_categories.product_id"
              ],
              "rows_examined_per_scan": 15,
              "rows_produced_per_join": 20,
              "filtered": "100.00",
              "using_index": true,
              "cost_info": {
                "read_cost": "0.48",
                "eval_cost": "2.07",
                "prefix_cost": "61.54",
                "data_read_per_join": "330"
              },
              "used_columns": [
                "product_id"
              ]
            }
          },
          {
            "table": {
              "table_name": "warehouses_destination_products_amount",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "idx_storefront_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id",
                "destination_id",
                "storefront_id"
              ],
              "key_length": "9",
              "ref": [
                "test_uchur_k.products_categories.product_id",
                "const",
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 20,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.00",
                "eval_cost": "2.07",
                "prefix_cost": "63.61",
                "data_read_per_join": "330"
              },
              "used_columns": [
                "destination_id",
                "storefront_id",
                "product_id",
                "amount"
              ],
              "attached_condition": "<if>(found_match(warehouses_destination_products_amount), (((case `test_uchur_k`.`products`.`is_stock_split_by_warehouses` when 'Y' then `test_uchur_k`.`warehouses_destination_products_amount`.`amount` else `test_uchur_k`.`products`.`amount` end) > 0) or (`test_uchur_k`.`products`.`tracking` = 'D')), true)"
            }
          },
          {
            "table": {
              "table_name": "popularity",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "total"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "test_uchur_k.products_categories.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 20,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.00",
                "eval_cost": "2.07",
                "prefix_cost": "65.68",
                "data_read_per_join": "661"
              },
              "used_columns": [
                "product_id",
                "total"
              ]
            }
          }
        ]
      }
    }
  }
}