SELECT * FROM `mj_access` WHERE `access_token` = '3c4ae53144598bddf86685e07858423a'
这句mysql放查询里面执行没问题可是
$access = M('Access')->where(array('access_token'=>'3c4ae53144598bddf86685e07858423a'))->find();
这样查询就会出错，求大神解释一下