UPDATE 
  cscart_lock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'XMxgrqstTElT0pXa5j+lLepF+nsLJ0XnJjbS73zhqtk=' 
WHERE 
  key_id = '9c781c10f2aad88c3604dca072eb86fec5ec7462733d3f96f19ba98e20120828' 
  AND (
    token = 'XMxgrqstTElT0pXa5j+lLepF+nsLJ0XnJjbS73zhqtk=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )