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 (
    71, 72, 73, 54, 69, 68, 70, 131, 46, 119, 
    120, 25, 87, 84, 31, 90, 82, 86, 89, 85, 
    92, 88, 93, 91, 94, 83, 53, 26, 28, 29, 
    27, 79, 77, 112, 114, 115
  )

Query time 0.00127

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "282.39"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "gpf",
          "access_type": "index",
          "possible_keys": [
            "PRIMARY",
            "idx_group_id"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "feature_id",
            "group_id"
          ],
          "key_length": "6",
          "rows_examined_per_scan": 101,
          "rows_produced_per_join": 35,
          "filtered": "35.64",
          "using_index": true,
          "cost_info": {
            "read_cost": "15.99",
            "eval_cost": "7.20",
            "prefix_cost": "23.19",
            "data_read_per_join": "3K"
          },
          "used_columns": [
            "feature_id",
            "group_id"
          ],
          "attached_condition": "(`cscart`.`gpf`.`group_id` in (71,72,73,54,69,68,70,131,46,119,120,25,87,84,31,90,82,86,89,85,92,88,93,91,94,83,53,26,28,29,27,79,77,112,114,115))"
        }
      },
      {
        "table": {
          "table_name": "gp",
          "access_type": "ref",
          "possible_keys": [
            "PRIMARY",
            "idx_group_id"
          ],
          "key": "idx_group_id",
          "used_key_parts": [
            "group_id"
          ],
          "key_length": "3",
          "ref": [
            "cscart.gpf.group_id"
          ],
          "rows_examined_per_scan": 3,
          "rows_produced_per_join": 107,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "108.00",
            "eval_cost": "21.60",
            "prefix_cost": "152.79",
            "data_read_per_join": "1K"
          },
          "used_columns": [
            "product_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": [
            "cscart.gpf.feature_id",
            "cscart.gp.product_id",
            "const"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 107,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "108.00",
            "eval_cost": "21.60",
            "prefix_cost": "282.39",
            "data_read_per_join": "83K"
          },
          "used_columns": [
            "feature_id",
            "product_id",
            "variant_id",
            "lang_code"
          ]
        }
      }
    ]
  }
}