Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3508d5d7ee5be73497c36a29758077ece998de07a3b6a520639564f79cbaae9c' 
  AND token = 'lAjk9Svn7/JtJAg4Z41xN9tInyHcZ4IxS8FMPoQtpL8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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