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 = 'vi' 
WHERE 
  pfv.feature_id IN (
    24869, 24868, 23514, 23512, 23515, 23513, 
    22368, 22561, 21917, 22370, 22369, 
    22566, 22563, 22570, 23740, 22571, 
    20429, 22568, 22367, 22578, 24201, 
    20430, 23732, 24633
  ) 
  AND pfv.product_id IN (
    33725, 33723, 33724, 34053, 50444, 25850, 
    26657, 1054, 350, 351, 2248, 2247, 2251, 
    36307, 2252, 3988, 2249, 353, 33721, 
    2260, 41230, 18710, 36299, 45597
  ) 
  AND pfv.lang_code = 'vi'

Query time 0.01227

JSON explain

{
  "query_block": {
    "select_id": 1,
    "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": "PRIMARY",
          "key_length": "6",
          "used_key_parts": ["feature_id", "product_id"],
          "rows": 604,
          "filtered": 0.995278418,
          "attached_condition": "pfv.feature_id in (24869,24868,23514,23512,23515,23513,22368,22561,21917,22370,22369,22566,22563,22570,23740,22571,20429,22568,22367,22578,24201,20430,23732,24633) and pfv.product_id in (33725,33723,33724,34053,50444,25850,26657,1054,350,351,2248,2247,2251,36307,2252,3988,2249,353,33721,2260,41230,18710,36299,45597) and pfv.lang_code = 'vi'",
          "using_index": true
        }
      },
      {
        "table": {
          "table_name": "fv",
          "access_type": "eq_ref",
          "possible_keys": ["PRIMARY", "feature_id"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["variant_id"],
          "ref": ["dev_db.pfv.variant_id"],
          "rows": 1,
          "filtered": 100,
          "attached_condition": "fv.feature_id = pfv.feature_id"
        }
      },
      {
        "table": {
          "table_name": "fvd",
          "access_type": "eq_ref",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "9",
          "used_key_parts": ["variant_id", "lang_code"],
          "ref": ["dev_db.pfv.variant_id", "const"],
          "rows": 1,
          "filtered": 100,
          "index_condition": "fvd.lang_code = 'vi'"
        }
      }
    ]
  }
}