我们用了rest api。想问下这个接口，传入的token有过期时间吗。

下面是返回结果，expires_in这是是指过期时间吗

{

    "access_token": "24.6925cfab18ff98b2f36e30c98a01b237.2592000.1472193306.282335-8427994",

    "session_key": "9mzdDc8m9BsOt92rgZVcw1AVSbyOoet2tl0TjuEOSIUr1atrXa6e/XhRCjPE7/hUpE6DAdl0fjB+7aM0JI+tI30MpC1n",

    "scope": "public audio_voice_assistant_get audio_tts_post wise_adapt lebo_resource_base lightservice_public hetu_basic lightcms_map_poi kaidian_kaidian wangrantest_test wangrantest_test1 vis-faceverify_faceverify bnstest_test1 vis-ocr_ocr",

    "refresh_token": "25.39d75603c70ed798d90c7e0db3cc5c8e.315360000.1784961306.282335-8427994",

    "session_secret": "856248b293242f5b1ce96224f9d7f775",

    "expires_in": 2592000

}