SELECT 
  product_id, 
  feature_id, 
  variant_id 
FROM 
  cscart_product_features_values 
WHERE 
  product_id IN (
    11360, 11359, 11358, 11357, 11356, 11355, 
    11354, 11353, 11352, 11351, 11350, 
    11349, 11348, 11347, 11346, 11345, 
    11344, 11343, 11342, 11341, 11340, 
    11339, 11338, 11337, 11336, 11335, 
    11334, 11333, 11332, 11331, 11330, 
    11329, 11328, 11327, 11326, 11325, 
    11324, 11323, 11322, 11321, 11409, 
    11408, 11407, 11406, 11405, 11404, 
    11403, 11402, 11401, 11400, 11399, 
    11398, 11397, 11396, 11395, 11394, 
    11393, 11392, 11391, 11390, 11389, 
    11388, 11387, 11386, 11385, 11384, 
    11383, 11382, 11381, 11380, 11379, 
    11378, 11377, 11376, 11375, 11374, 
    11373, 11372, 11371, 11370, 11369, 
    11368, 11367, 11366, 11365, 11364, 
    11363, 11362, 11361, 11320
  ) 
  AND feature_id IN (627, 553, 625, 624, 628) 
  AND lang_code = 'en'

Query time 0.00379

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "101.36"
    },
    "table": {
      "table_name": "cscart_product_features_values",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY",
        "fl",
        "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": 450,
      "rows_produced_per_join": 450,
      "filtered": "100.00",
      "using_index": true,
      "cost_info": {
        "read_cost": "56.36",
        "eval_cost": "45.00",
        "prefix_cost": "101.36",
        "data_read_per_join": "348K"
      },
      "used_columns": [
        "feature_id",
        "product_id",
        "variant_id",
        "lang_code"
      ],
      "attached_condition": "((`gaseus`.`cscart_product_features_values`.`product_id` in (11360,11359,11358,11357,11356,11355,11354,11353,11352,11351,11350,11349,11348,11347,11346,11345,11344,11343,11342,11341,11340,11339,11338,11337,11336,11335,11334,11333,11332,11331,11330,11329,11328,11327,11326,11325,11324,11323,11322,11321,11409,11408,11407,11406,11405,11404,11403,11402,11401,11400,11399,11398,11397,11396,11395,11394,11393,11392,11391,11390,11389,11388,11387,11386,11385,11384,11383,11382,11381,11380,11379,11378,11377,11376,11375,11374,11373,11372,11371,11370,11369,11368,11367,11366,11365,11364,11363,11362,11361,11320)) and (`gaseus`.`cscart_product_features_values`.`feature_id` in (627,553,625,624,628)) and (`gaseus`.`cscart_product_features_values`.`lang_code` = 'en'))"
    }
  }
}