UPDATE 
  cscart_multi_declock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'rNu5h2Hf8fpbJnpmeQEyTce10RV/Cuf6xIgMYJ+yNoU=' 
WHERE 
  key_id = '68d21f068887c7b430dcfa8b608c3e6c4cab35769ac3c239b0529e4f17baa58c' 
  AND (
    token = 'rNu5h2Hf8fpbJnpmeQEyTce10RV/Cuf6xIgMYJ+yNoU=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )