You should be fine, the GT 1030 only uses about 30w and your CPU is 55w. Even with your RAM, HDD and case fans, I think that 150w the calculator gave you would be the absolute highest possible and most of the time you would be below 100w. Obviously the quality of the PSU has to be considered, and I know nothing about it as it's probably only available in India, but I'm sure it's good enough to supply the small amount that's needed.