UPDATE 
  cscart_lock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'mMHDbmXLAmTepjd3E3lHsKENyMOGZ6RkhCHmIrpoRT8=' 
WHERE 
  key_id = '83e1e93417fec5f5dd74d7888920b1b8e71e35d9277a0e7bba97d87dccfef139' 
  AND (
    token = 'mMHDbmXLAmTepjd3E3lHsKENyMOGZ6RkhCHmIrpoRT8=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )

Query time 0.00049