Depending on the resolution, you should be getting better than 25 FPS on CS:GO; it's a very undemanding game. The A10-5745M has a Radeon HD 8610G for graphics, which should be
comparable in performance to the Radeon HD 7660G.
The Radeon HD 7660G, according to
Notebookcheck, should be able to get 39 FPS at 1080p with essentially ultra settings when playing CS:GO.
Make sure the power options on your laptop are set to "max performance", or similar, then with the laptop plugged in, try lowering some of the details and/or resolution, and see what that does to your framerates. If you don't see any improvement, double check you have the most up to date drivers for the graphics portion of your APU, and double check there aren't...