SELECT 
  cscart_product_descriptions.product_id, 
  cscart_product_descriptions.short_description, 
  IF(
    cscart_product_descriptions.short_description = '' 
    OR cscart_product_descriptions.short_description IS NULL, 
    cscart_product_descriptions.full_description, 
    ''
  ) AS full_description, 
  cscart_product_descriptions.unit_name 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    22463, 22464, 22465, 22466, 22467, 22468, 
    22469, 22470, 22471, 22472, 22473, 
    22474, 22475, 22476, 22477, 22478
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_product_descriptions",
      "access_type": "range",
      "possible_keys": ["PRIMARY", "product_id", "idx_product_lang"],
      "key": "PRIMARY",
      "key_length": "9",
      "used_key_parts": ["product_id", "lang_code"],
      "rows": 16,
      "filtered": 100,
      "index_condition": "cscart_product_descriptions.product_id in (22463,22464,22465,22466,22467,22468,22469,22470,22471,22472,22473,22474,22475,22476,22477,22478) and cscart_product_descriptions.lang_code = 'en'"
    }
  }
}

Result

product_id short_description full_description unit_name
22463 Member assembly - rear floor side extension, left<p>Part number 65613AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22464 Extension assembly - center floor side inner, left<p>Part number 65615AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22465 Extension assembly - center floor side inner, right<p>Part number 65625AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22466 Bracket Assembly - Fuel Tank Mounting Front<p>Part number 65617AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22467 Member assembly - rear floor side extension, right<p>Part number 65623AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22468 Member Assembly - Rear Floor Intermediate Cross<p>Part number 65631AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22469 Extension assembly - center floor side member rear lower, left<p>Part number 65635AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22470 Reinforcement - rear subframe mounting rear upper front, left<p>Part number 65639AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22471 Reinforcement - rear subframe mounting rear upper front, right<p>Part number 65649AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22472 Reinforcement-rear subframe mounting rear upper, left<p>Part number 65654AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22473 Bracket assembly - 2nd row seat rear outer, left<p>Part number 65655AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22474 Reinforcement - Rear subframe mounting rear upper, right<p>Part number 65664AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22475 Bracket assembly - 2nd row seat rear outer, right<p>Part number 65665AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22476 Bracket assembly - rear floor spring seat, left<p>Part number 65675AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22477 Bracket assembly - rear floor spring seat, right<p>Part number 65685AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22478 Panel - spare tire wheel rear<p>Part number 65696AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>