This one is actually too easy. Pick Fuji GP track, get a fast car (LMP1 works out perfectly, any one of them), select Storm as weather forecast and pick 0 AI opponents as it makes it even easier.
Drive a clean lap (do not hit anything, you can even leave the road but as long as your lap time is not disqualified) and you'll get it. I got this achievement on the very first lap as it took me 1:47 to complete it (second lap was 1:39).
Very easy achievement.