UPDATE 
  cscart_lock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'png/mxbtrXhwr6OgDJ+VvpG34dXCezZcX8EdCUESqAM=' 
WHERE 
  key_id = '79e7839124d26891ec33deed75a2c5eb21603e4e9ca8eb9f5ade391f2f4f901f' 
  AND (
    token = 'png/mxbtrXhwr6OgDJ+VvpG34dXCezZcX8EdCUESqAM=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )