Yes, you can microwave it for 1 min and let it cool for 10 mins. But, you need to think if you cool it in open air, it will absorb moisture in air again, so you need metal plate to let it cool faster. Don't do it on rainy day as humidity outside is high.
If you put on sealed container, the silica gel will have humidity at that moment (no much humidity will be release to air since it is on sealed container, the silica gel will absorb it again).