Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '0e69b3ab9b2de488ac2bbb4c103fb6775526ee7f69bf769158f741f6004a3dbf' 
  AND token = 'ZiA8G57sFRmjfCaYsPR451y+7ohHSyT8jlp4uQ11JLo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}