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 (
    22036, 23532, 23527, 23531, 23533, 23530, 
    23529, 20263, 22178, 23526, 23528, 
    24745, 24481, 25064, 24744, 21892, 
    25065, 23483, 25066
  ) 
  AND pfv.product_id IN (
    854, 35242, 35167, 35174, 35176, 35172, 
    35171, 18264, 632, 35166, 35169, 49811, 
    44281, 41292, 47012, 1089, 41291, 33702, 
    41294
  ) 
  AND pfv.lang_code = 'vi'

Query time 0.02273

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": "product_id",
          "key_length": "3",
          "used_key_parts": ["product_id"],
          "rowid_filter": {
            "range": {
              "key": "fl",
              "used_key_parts": ["feature_id", "lang_code"]
            },
            "rows": 146,
            "selectivity_pct": 0.092369986
          },
          "rows": 99,
          "filtered": 0.092369989,
          "index_condition": "pfv.product_id in (854,35242,35167,35174,35176,35172,35171,18264,632,35166,35169,49811,44281,41292,47012,1089,41291,33702,41294)",
          "attached_condition": "pfv.feature_id in (22036,23532,23527,23531,23533,23530,23529,20263,22178,23526,23528,24745,24481,25064,24744,21892,25065,23483,25066) and pfv.lang_code = 'vi'"
        }
      },
      {
        "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'"
        }
      }
    ]
  }
}