SELECT 
  cscart_ult_product_descriptions.product_id, 
  cscart_ult_product_descriptions.short_description, 
  IF(
    cscart_ult_product_descriptions.short_description = "", 
    cscart_ult_product_descriptions.full_description, 
    ""
  ) AS full_description, 
  cscart_ult_product_descriptions.meta_keywords, 
  cscart_ult_product_descriptions.meta_description, 
  cscart_ult_product_descriptions.search_words, 
  cscart_ult_product_descriptions.promo_text 
FROM 
  cscart_ult_product_descriptions 
WHERE 
  cscart_ult_product_descriptions.product_id IN (
    489, 3654, 3655, 3664, 3657, 467, 3663, 
    491, 490, 459, 506, 468, 488, 6024, 505, 
    504, 492, 4978, 3739, 4979, 4981, 5916, 
    5921, 5917
  ) 
  AND cscart_ult_product_descriptions.company_id = 1 
  AND cscart_ult_product_descriptions.lang_code = 'en'

Query time 0.00033

JSON explain

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  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_ult_product_descriptions",
      "access_type": "range",
      "possible_keys": ["PRIMARY", "product_id", "company_id"],
      "key": "product_id",
      "key_length": "3",
      "used_key_parts": ["product_id"],
      "rows": 24,
      "filtered": 100,
      "index_condition": "cscart_ult_product_descriptions.product_id in (489,3654,3655,3664,3657,467,3663,491,490,459,506,468,488,6024,505,504,492,4978,3739,4979,4981,5916,5921,5917)",
      "attached_condition": "cscart_ult_product_descriptions.company_id = 1 and cscart_ult_product_descriptions.lang_code = 'en'"
    }
  }
}

Result

product_id short_description full_description meta_keywords meta_description search_words promo_text
492 <p>PCTEL - 144-174 MHz, 3db gain, DC ground chrome antenna (cable not included).</p> MHBDC-5800, MHB-5800, MHB-DC5800
3655 <p> Laird Technologies B1442N antenna is a 1/2 wave stainless 2.4 dB gain whip operating in the 144-174 MHz range. &nbsp;No ground plane required. &nbsp;</p>
3657 <p> Laird Technologies B8065C closed collinear antenna with a tuneable center load. 5 dB gain stainless.</p>
3663 <p> Laird Technologies B4505CS is a 5 dB gain chrome antenna with spring operating in the 450-470 MHz range.</p>
3739 <p> Laird Technologies - 5/8 wave 806-896 MHz flexible antenna with a black finish. &nbsp;Antenna rated for 3dB gain with a coiled center.</p>
6024 <p>Radiall/Larsen NMO3E800B base loaded mobile antenna with 3.2 db gain, closed coil, black stainless. 13.5" whip length. </p><p>25 in stock </p>