It's within walking distance only if you're buying a small quantity of light-weight items - I wouldn't walk that far with liquids or heavier items. If you walk down the main road along all the restaurants, the Asian market (although they carry everything) is on the left just after Piazza Pascal. Or it might be just before - but it's right near there on the same side of the road.

If you need to buy heavy things or large quantities, you may be better off going to Hope Estate to the bigger supermarket if you have a car.