UPDATE 
  cscart_multi_declock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'U7vwperiBxJhv3l93N0voTTAYJhjxEiRdG3gDnm0xvs=' 
WHERE 
  key_id = '79ec390db3c3d909d39797d416f9b8d0149d74a096fa69b63854e0b5e6b0606d' 
  AND (
    token = 'U7vwperiBxJhv3l93N0voTTAYJhjxEiRdG3gDnm0xvs=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )