SELECT 
  pf.feature_id, 
  pf.company_id, 
  pf.feature_type, 
  pf.parent_id, 
  pf.display_on_product, 
  pf.display_on_catalog, 
  pf.display_on_header, 
  pf.categories_path, 
  pf.status, 
  pf.comparison, 
  pf.position, 
  pf.purpose, 
  pf.feature_style, 
  pf.filter_style, 
  pf.feature_code, 
  pfd.description, 
  pfd.lang_code, 
  pfd.prefix, 
  pfd.suffix, 
  pfd.full_description, 
  pfv.value, 
  pfv.variant_id, 
  pfv.value_int, 
  pfv.product_id 
FROM 
  cscart_product_features_values AS pfv 
  LEFT JOIN cscart_product_features AS pf ON pfv.feature_id = pf.feature_id 
  LEFT JOIN cscart_product_features_descriptions AS pfd ON pfd.feature_id = pf.feature_id 
  AND pfd.lang_code = 'en' 
WHERE 
  1 = 1 
  AND pfv.product_id IN (
    431615, 431616, 431617, 431618, 431619, 
    431620, 431621, 431622, 431623, 431624, 
    431625, 431626, 431627, 431628, 431629, 
    431630, 431631, 431632, 431633, 431634, 
    431635, 431636, 431637, 431638, 431639, 
    431640, 431641, 431642, 431643, 431644, 
    431645, 431646, 431647, 431648, 431649, 
    431650, 431651, 431652, 431653, 431654, 
    431655, 431656, 431657, 431658
  ) 
  AND pfv.lang_code = 'en' 
  AND pf.feature_code IN ('Brand', 'ISBN', 'GTIN', 'MPN')

Query time 0.00617

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "6504.03"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "pfv",
          "access_type": "range",
          "possible_keys": [
            "PRIMARY",
            "fl",
            "lang_code",
            "product_id",
            "fpl",
            "idx_product_feature_variant_id"
          ],
          "key": "product_id",
          "used_key_parts": [
            "product_id"
          ],
          "key_length": "3",
          "rows_examined_per_scan": 4356,
          "rows_produced_per_join": 215,
          "filtered": "4.94",
          "index_condition": "((`webmarco`.`pfv`.`product_id` in (431615,431616,431617,431618,431619,431620,431621,431622,431623,431624,431625,431626,431627,431628,431629,431630,431631,431632,431633,431634,431635,431636,431637,431638,431639,431640,431641,431642,431643,431644,431645,431646,431647,431648,431649,431650,431651,431652,431653,431654,431655,431656,431657,431658)) and (`webmarco`.`pfv`.`lang_code` = 'en'))",
          "cost_info": {
            "read_cost": "6099.36",
            "eval_cost": "43.05",
            "prefix_cost": "6142.41",
            "data_read_per_join": "166K"
          },
          "used_columns": [
            "feature_id",
            "product_id",
            "variant_id",
            "value",
            "value_int",
            "lang_code"
          ]
        }
      },
      {
        "table": {
          "table_name": "pf",
          "access_type": "eq_ref",
          "possible_keys": [
            "PRIMARY"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "feature_id"
          ],
          "key_length": "3",
          "ref": [
            "webmarco.pfv.feature_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 86,
          "filtered": "40.00",
          "cost_info": {
            "read_cost": "215.25",
            "eval_cost": "17.22",
            "prefix_cost": "6400.71",
            "data_read_per_join": "36K"
          },
          "used_columns": [
            "feature_id",
            "feature_code",
            "company_id",
            "purpose",
            "feature_style",
            "filter_style",
            "feature_type",
            "categories_path",
            "parent_id",
            "display_on_product",
            "display_on_catalog",
            "display_on_header",
            "status",
            "position",
            "comparison"
          ],
          "attached_condition": "(`webmarco`.`pf`.`feature_code` in ('Brand','ISBN','GTIN','MPN'))"
        }
      },
      {
        "table": {
          "table_name": "pfd",
          "access_type": "eq_ref",
          "possible_keys": [
            "PRIMARY"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "feature_id",
            "lang_code"
          ],
          "key_length": "9",
          "ref": [
            "webmarco.pfv.feature_id",
            "const"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 86,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "86.10",
            "eval_cost": "17.22",
            "prefix_cost": "6504.03",
            "data_read_per_join": "195K"
          },
          "used_columns": [
            "feature_id",
            "description",
            "full_description",
            "prefix",
            "suffix",
            "lang_code"
          ]
        }
      }
    ]
  }
}