SELECT 
  cscart_product_descriptions.product_id, 
  cscart_product_descriptions.short_description, 
  IF(
    cscart_product_descriptions.short_description = '', 
    cscart_product_descriptions.full_description, 
    ''
  ) AS full_description, 
  cscart_product_descriptions.meta_keywords, 
  cscart_product_descriptions.meta_description, 
  cscart_product_descriptions.search_words, 
  cscart_product_descriptions.promo_text 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (4727, 4728, 4729, 4736, 4737, 5118) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_product_descriptions",
      "access_type": "range",
      "possible_keys": ["PRIMARY", "product_id"],
      "key": "product_id",
      "key_length": "3",
      "used_key_parts": ["product_id"],
      "rows": 6,
      "filtered": 100,
      "index_condition": "cscart_product_descriptions.product_id in (4727,4728,4729,4736,4737,5118)",
      "attached_condition": "cscart_product_descriptions.lang_code = 'en'"
    }
  }
}

Result

product_id short_description full_description meta_keywords meta_description search_words promo_text
4727 <p>Replacement loop for carry cases with a swivel belt loop</p> APX 1000 Case, APX 4000 Case, APX 4000XE Case, APX 6000 Case, APX 6000XE Case, APX 7000 Case, APX 7000XE Cases
4728 <p>Replacement loop for carry cases with a swivel belt loop</p> APX 1000 Case, APX 4000 Case, APX 4000XE Case, APX 6000 Case, APX 6000XE Case, APX 7000 Case, APX 7000XE Cases
4729 <p>Replacement loop for carry cases with a swivel belt loop for all APX Series radios. </p> APX 1000 Case, APX 4000 Case, APX 4000XE Case, APX 6000 Case, APX 6000XE Case, APX 7000 Case, APX 7000XE Cases, APX1000, APX4000, APX4000XE, APX6000, APX6000XE, APX7000, APX7000XE
4736 <p>Spring action 3" belt clip that is used with the Top Display APX portables. </p> APX 6000 Case, APX 6000XE Case, APX 7000 Case, APX 7000XE Cases
4737 <p>2.5" APX belt clip </p> NTN8266A, APX 6000 Case, APX 6000XE Case, APX 7000 Case, APX 7000XE Cases
5118