SELECT 
  pfv.feature_id, 
  pfv.product_id, 
  pfv.variant_id, 
  gp.group_id 
FROM 
  cscart_product_features_values AS pfv 
  INNER JOIN cscart_product_variation_group_products AS gp ON pfv.product_id = gp.product_id 
  INNER JOIN cscart_product_variation_group_features AS gpf ON gpf.group_id = gp.group_id 
  AND gpf.feature_id = pfv.feature_id 
WHERE 
  pfv.lang_code = 'ru' 
  AND gp.group_id IN (
    260, 258, 257, 190, 192, 259, 191, 194, 
    195, 255, 256, 140, 125, 139, 126, 128, 
    236, 124, 127, 254, 102, 143, 214, 204, 
    206, 133, 132, 131, 154, 248, 184, 235, 
    233, 187, 138, 189, 243, 134, 234, 142, 
    137, 150, 188, 183, 198, 35, 186, 185, 
    149, 205, 136, 237, 135, 123, 122, 180, 
    208, 224, 207, 218, 176, 181, 175
  )

Query time 0.00259

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "227.30"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "gp",
          "access_type": "index",
          "possible_keys": [
            "PRIMARY",
            "idx_group_id"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "product_id",
            "group_id"
          ],
          "key_length": "6",
          "rows_examined_per_scan": 501,
          "rows_produced_per_join": 251,
          "filtered": "50.30",
          "using_index": true,
          "cost_info": {
            "read_cost": "25.71",
            "eval_cost": "25.20",
            "prefix_cost": "50.91",
            "data_read_per_join": "3K"
          },
          "used_columns": [
            "product_id",
            "group_id"
          ],
          "attached_condition": "(`test_uchur_k`.`gp`.`group_id` in (260,258,257,190,192,259,191,194,195,255,256,140,125,139,126,128,236,124,127,254,102,143,214,204,206,133,132,131,154,248,184,235,233,187,138,189,243,134,234,142,137,150,188,183,198,35,186,185,149,205,136,237,135,123,122,180,208,224,207,218,176,181,175))"
        }
      },
      {
        "table": {
          "table_name": "gpf",
          "access_type": "ref",
          "possible_keys": [
            "PRIMARY",
            "idx_group_id"
          ],
          "key": "idx_group_id",
          "used_key_parts": [
            "group_id"
          ],
          "key_length": "3",
          "ref": [
            "test_uchur_k.gp.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 251,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "63.00",
            "eval_cost": "25.20",
            "prefix_cost": "139.11",
            "data_read_per_join": "25K"
          },
          "used_columns": [
            "feature_id",
            "group_id"
          ]
        }
      },
      {
        "table": {
          "table_name": "pfv",
          "access_type": "ref",
          "possible_keys": [
            "PRIMARY",
            "fl",
            "lang_code",
            "product_id",
            "fpl",
            "idx_product_feature_variant_id"
          ],
          "key": "fpl",
          "used_key_parts": [
            "feature_id",
            "product_id",
            "lang_code"
          ],
          "key_length": "12",
          "ref": [
            "test_uchur_k.gpf.feature_id",
            "test_uchur_k.gp.product_id",
            "const"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 251,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "63.00",
            "eval_cost": "25.20",
            "prefix_cost": "227.31",
            "data_read_per_join": "194K"
          },
          "used_columns": [
            "feature_id",
            "product_id",
            "variant_id",
            "lang_code"
          ]
        }
      }
    ]
  }
}