Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '597926204017fbd7e0330f25322950c7a3b7324640c2f468875c52f693e74f90' 
  AND token = '99Uo0PAWVV1k9jgXlpCZOzHBYxRmON1L5dR6sDslSwc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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