UPDATE 
  cscart_lock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'Vb/G1PC/ahQsrHmuVfqK5xNqObDAYdV9EUfoRIYQ+g0=' 
WHERE 
  key_id = 'dc6e964fe148e706dba85abab236f09d22058a6ff9860d939001a6a201208043' 
  AND (
    token = 'Vb/G1PC/ahQsrHmuVfqK5xNqObDAYdV9EUfoRIYQ+g0=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )