UPDATE 
  cscart_multi_declock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'f6Q2RThfaUfVGMatMVHE2xRlefOnvOME272rV6zbY/k=' 
WHERE 
  key_id = 'c839fda99713c283b270d69c92be8aae8b9ef15ca7212d26a2971a944961e0a3' 
  AND (
    token = 'f6Q2RThfaUfVGMatMVHE2xRlefOnvOME272rV6zbY/k=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )