SELECT 
  pfv.feature_id, 
  pfv.product_id, 
  pfv.variant_id, 
  fv.position, 
  fvd.variant 
FROM 
  cscart_product_features_values AS pfv 
  INNER JOIN cscart_product_feature_variants AS fv ON pfv.feature_id = fv.feature_id 
  AND pfv.variant_id = fv.variant_id 
  INNER JOIN cscart_product_feature_variant_descriptions AS fvd ON pfv.variant_id = fvd.variant_id 
  AND fvd.lang_code = 'kk' 
WHERE 
  pfv.feature_id IN (193) 
  AND pfv.product_id IN (
    27, 121, 23, 141, 4, 142, 120, 62, 108, 
    107, 94, 8, 86, 54, 10, 93, 12, 32, 7, 130, 
    35, 16, 33, 110, 34, 89, 114, 147, 36, 
    128, 20, 52, 84, 109, 118, 131, 13, 19, 
    61, 146, 95, 15, 9, 85, 111, 59, 144, 123, 
    60, 113, 145, 6, 14, 63, 136, 50984, 127, 
    134, 42, 50985, 50986, 50988, 50993, 
    50992
  ) 
  AND pfv.lang_code = 'kk'

Query time 0.00177

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "37.21"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "pfv",
          "access_type": "range",
          "possible_keys": [
            "PRIMARY",
            "fl",
            "variant_id",
            "lang_code",
            "product_id",
            "fpl",
            "idx_product_feature_variant_id"
          ],
          "key": "idx_product_feature_variant_id",
          "used_key_parts": [
            "product_id",
            "feature_id",
            "lang_code"
          ],
          "key_length": "12",
          "rows_examined_per_scan": 64,
          "rows_produced_per_join": 64,
          "filtered": "100.00",
          "using_index": true,
          "cost_info": {
            "read_cost": "7.29",
            "eval_cost": "6.40",
            "prefix_cost": "13.69",
            "data_read_per_join": "49K"
          },
          "used_columns": [
            "feature_id",
            "product_id",
            "variant_id",
            "lang_code"
          ],
          "attached_condition": "((`test_uchur_k`.`pfv`.`feature_id` = 193) and (`test_uchur_k`.`pfv`.`product_id` in (27,121,23,141,4,142,120,62,108,107,94,8,86,54,10,93,12,32,7,130,35,16,33,110,34,89,114,147,36,128,20,52,84,109,118,131,13,19,61,146,95,15,9,85,111,59,144,123,60,113,145,6,14,63,136,50984,127,134,42,50985,50986,50988,50993,50992)) and (`test_uchur_k`.`pfv`.`lang_code` = 'kk'))"
        }
      },
      {
        "table": {
          "table_name": "fv",
          "access_type": "eq_ref",
          "possible_keys": [
            "PRIMARY",
            "feature_id"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "variant_id"
          ],
          "key_length": "3",
          "ref": [
            "test_uchur_k.pfv.variant_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 3,
          "filtered": "5.00",
          "cost_info": {
            "read_cost": "16.00",
            "eval_cost": "0.32",
            "prefix_cost": "36.09",
            "data_read_per_join": "4K"
          },
          "used_columns": [
            "variant_id",
            "feature_id",
            "position"
          ],
          "attached_condition": "(`test_uchur_k`.`fv`.`feature_id` = 193)"
        }
      },
      {
        "table": {
          "table_name": "fvd",
          "access_type": "eq_ref",
          "possible_keys": [
            "PRIMARY"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "variant_id",
            "lang_code"
          ],
          "key_length": "9",
          "ref": [
            "test_uchur_k.pfv.variant_id",
            "const"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 3,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "0.80",
            "eval_cost": "0.32",
            "prefix_cost": "37.21",
            "data_read_per_join": "9K"
          },
          "used_columns": [
            "variant_id",
            "variant",
            "lang_code"
          ]
        }
      }
    ]
  }
}