UPDATE 
  cscart_multi_declock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'U5PLzkEJMe69GcGutIwarHL1ODOjsUoqLlVan5NH/6o=' 
WHERE 
  key_id = '4918428a4595096769222f8e267e281f33b47983e602cc16c45b3e1a61681326' 
  AND (
    token = 'U5PLzkEJMe69GcGutIwarHL1ODOjsUoqLlVan5NH/6o=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )