UPDATE 
  cscart_lock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = '6VJ9QVp2WSJOy++WCfPVTnYQM/keugXgU/YoLjUWzE0=' 
WHERE 
  key_id = '68fd21b2e57af901a5a4d4bd4903da1dcd5926632c3087e51c2a2a1373724985' 
  AND (
    token = '6VJ9QVp2WSJOy++WCfPVTnYQM/keugXgU/YoLjUWzE0=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )