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 (
    22111, 22112, 22113, 22114, 22115, 22116, 
    22117, 22118, 22119, 22120, 22121, 
    22122, 22123, 22124, 22125, 22126
  ) 
  AND cscart_product_descriptions.lang_code = 'ru'

Query time 0.00936

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 (22111,22112,22113,22114,22115,22116,22117,22118,22119,22120,22121,22122,22123,22124,22125,22126) and cscart_product_descriptions.lang_code = 'ru'"
    }
  }
}

Result

product_id short_description full_description unit_name
22111 pad-fuel tank<p>Part number 311012S300</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22112 Cover - Fuel Pump<p>Part number 31107AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22113 Tube Assembly - Fuel Tank Suksen<p>Part number 31113AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22114 Pump Assembly - Fuel<p>Part number 31120AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22115 color<p>Part number 31126AR100</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22116 Tube Assy-Tank to Canister<p>Part number 31127AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22117 Packing-Fuel Pump<p>Part number 311150W000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22118 clamp assembly<p>Part number 31141F2100</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22119 Tank Assembly - Fuel<p>Part number 31150AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22120 Band assembly-fuel tank left<p>Part number 31210AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22121 Protector-Fuel Tank Heat<p>Part number 31220AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22122 Holder - Fuel Tube<p>Part number 31354AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22123 Sender Assembly-Fuel Pump<p>Part number 94460AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22124 Protector - fuel line front<p>Part number 31315AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22125 Holder - Fuel Tube<p>Part number 31355AR000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
22126 Holder - Fuel Tube<p>Part number 31356AR050</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>