UPDATE 
  cscart_multi_declock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'Zk7NJphi2jU1gEdBf30cUMCEjJjFgHLPnB1xeEEdZkQ=' 
WHERE 
  key_id = '6196027d39e329a4e6147953058013de2a302d24a812aa04319d788d805e7017' 
  AND (
    token = 'Zk7NJphi2jU1gEdBf30cUMCEjJjFgHLPnB1xeEEdZkQ=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )