There are several treatments to help improve acne
One common treatment used to improve the appearance of these acne scars is to do skin resurfacing. Resurfacing involves removing the outer layers of skin cell and then allowing new skin cells to reline the area giving a more smooth appearance.
Ice pick scars have a relatively narrow base but are deep making it difficult to remove the surrounding skin cells deep enough to fully improve the scar. In my experience what works best in these situations is to directly excise the ice pick scars (as if you were removing a mole, for example). I usually allow these excision sites to heal and then perform a second stage resurfacing procedure to the affected areas of the face, though (since you were looking for a fast treatment) you don't necessarily have to do a second stage if you are happy with the improvement from the initial excision.