SELECT 
  product_id, 
  feature_short_desc 
FROM 
  cscart_ab__short_desc_from_features_values 
WHERE 
  product_id IN (
    21206, 21207, 21208, 21209, 21210, 21211, 
    21212, 21213, 21214, 21536, 21215, 
    21234, 21216, 21217, 21218, 21219, 
    20002, 20005, 20009, 20617, 18834, 
    18836, 13692, 13699
  ) 
  AND lang_code = 'en' 
  AND storefront_id = 1 
  AND cscart_ab__short_desc_from_features_values.company_id = 1

Query time 0.00052

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_ab__short_desc_from_features_values",
          "access_type": "range",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "17",
          "used_key_parts": [
            "product_id",
            "lang_code",
            "company_id",
            "storefront_id"
          ],
          "rows": 24,
          "filtered": 100,
          "attached_condition": "cscart_ab__short_desc_from_features_values.storefront_id = 1 and cscart_ab__short_desc_from_features_values.company_id = 1 and cscart_ab__short_desc_from_features_values.product_id in (21206,21207,21208,21209,21210,21211,21212,21213,21214,21536,21215,21234,21216,21217,21218,21219,20002,20005,20009,20617,18834,18836,13692,13699) and cscart_ab__short_desc_from_features_values.lang_code = 'en'"
        }
      }
    ]
  }
}