UPDATE 
  cscart_multi_declock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'ep38Vds38vgo5iHSPus6IWXTpBn8Px2KqwYhZiI+3/U=' 
WHERE 
  key_id = '68b36fdfb6ce03d24b37c42bc410de5b4b329b867e576c568f13b918716c9090' 
  AND (
    token = 'ep38Vds38vgo5iHSPus6IWXTpBn8Px2KqwYhZiI+3/U=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )