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 (
    22031, 22032, 22033, 22034, 22035, 22036, 
    22037, 22038, 22039, 22040, 22041, 
    22042, 22043, 22044, 22045, 22046
  ) 
  AND cscart_product_descriptions.lang_code = 'ru'

Query time 0.00042

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 (22031,22032,22033,22034,22035,22036,22037,22038,22039,22040,22041,22042,22043,22044,22045,22046) and cscart_product_descriptions.lang_code = 'ru'"
    }
  }
}

Result

product_id short_description full_description unit_name
22031 Hose-brake front, left<p>Part number 58731T6550</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22032 Hose-brake front, right<p>Part number 58732T6550</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22033 Bolted crossmember mounting<p>Part number 62419DS000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22034 Bracket assembly - 3rd row seat rail mounting, left<p>Part number 654A1T6000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22035 Bracket assembly - 3rd row seat rail mounting, right<p>Part number 654B1T6000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22036 Panel complete - rear floor<p>Part number 65500T6050</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22037 Bracket assembly-3RD seat rear mounting, left<p>Part number 65473T6000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22038 Auto Transaxle and Torque Converter Assembly<p>Part number 4500047EA1</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22039 Hose Assembly-Lower<p>Part number 2545147002</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22040 Shaft Assembly-Output<p>Part number 4581047000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22041 Shaft Assembly - Propeller<p>Part number 49100T1400</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22042 Shock absorber assembly-front, left<p>Part number 54605T1020</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22043 spring-front<p>Part number 54630T1000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22044 Shock Absorber Assembly-Front, Right<p>Part number 54606T1020</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22045 insulator<p>Part number 21762B1100</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22046 Crossmember-rear<p>Part number 55405T1002</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>