SELECT 
  product_id, 
  feature_id, 
  variant_id 
FROM 
  cscart_product_features_values 
WHERE 
  product_id IN (
    49958, 25318, 49957, 49956, 49955, 49954, 
    49953, 49952, 49951, 49950, 49949, 
    49959, 49960, 49961, 49962, 49963, 
    49964, 49965, 49966, 49967, 49968, 
    49969, 49970, 49971, 49972, 49973, 
    49974, 49975, 49976, 49977, 49978, 
    49979, 49980, 49981, 49982, 49983, 
    49984, 49985, 49986, 49987, 49988, 
    49989, 49990, 49991, 49992, 49993, 
    49994, 49995, 49996, 49997, 49998, 
    49999, 50000, 50001, 50002, 50003, 
    50004, 50005, 50006, 50007, 50008, 
    50009, 50010, 50011, 50012, 50013, 
    50014, 50015, 50016, 50017, 50018, 
    50019, 50020, 50021, 50022, 50023, 
    50024, 50025, 50026, 50027, 50028, 
    50029, 50030, 50031, 50032, 50033, 
    50034, 50035, 50036, 50037
  ) 
  AND feature_id IN (22290, 22291) 
  AND lang_code = 'vi'

Query time 0.00657

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "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",
          "key_length": "12",
          "used_key_parts": ["product_id", "feature_id", "lang_code"],
          "rows": 358,
          "filtered": 50.27933121,
          "attached_condition": "cscart_product_features_values.product_id in (49958,25318,49957,49956,49955,49954,49953,49952,49951,49950,49949,49959,49960,49961,49962,49963,49964,49965,49966,49967,49968,49969,49970,49971,49972,49973,49974,49975,49976,49977,49978,49979,49980,49981,49982,49983,49984,49985,49986,49987,49988,49989,49990,49991,49992,49993,49994,49995,49996,49997,49998,49999,50000,50001,50002,50003,50004,50005,50006,50007,50008,50009,50010,50011,50012,50013,50014,50015,50016,50017,50018,50019,50020,50021,50022,50023,50024,50025,50026,50027,50028,50029,50030,50031,50032,50033,50034,50035,50036,50037) and cscart_product_features_values.feature_id in (22290,22291) and cscart_product_features_values.lang_code = 'vi'",
          "using_index": true
        }
      }
    ]
  }
}