UPDATE 
  cscart_multi_declock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'BljDB0o2khFE6HLdKs//3mlarwcglhgV5Z91YTs0XNI=' 
WHERE 
  key_id = 'c8b855c816c63febc166f17aadd741d608e6fce6f2e3c5424e261f0fe7898628' 
  AND (
    token = 'BljDB0o2khFE6HLdKs//3mlarwcglhgV5Z91YTs0XNI=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )