HOT WHEELS UNLEASHED 2 - Turbocharged

Fastest way to rip this out is to play Waypoint races with a vehicle that has large amounts of boost (like the Heavy-Duty class of vehicles). You get a full boost refill after every checkpoint, so you could potentially boost the entire length of the race.

Quick Modes > Single Player > Time Attack > 'Community tracks' > (View 'LM/Select') Search > Name: Like lightning! > (Menu 'RM/Start') 'Apply and exit' > to 'Add to favourite tracks' (if not done in one go) > Select 'Like lightning!' > Select vehicle > Continue > Just hold to boost round circuit - but you can also tap to initiate a drift and hold if you want ½ million centimetres of drifting for 'Drifting teacher'🏆 (my '24 Ours' car can continuously drift the loop, but you'll want a fast vehicle to drift 500,000 cm!).
The achievement tracker only updates after you Exit and return to the main menu, but you will unlock 'Like lightning!'🏆 mid-race when the 30 minute total is reached (and 'Drifting teacher' a lot later - I did almost 10% of the required drifting in 5 minutes, so it's about 2%/min, depending on the vehicle, and the Hyperboost 7th skill probably speeds things up. See: 'Better too much'🏆).
Alternatively, use Track Builder to create your own mini circle Circuit, adding lots of Boost Charge Bumpers (not Boost Triggers - auto-boost doesn't count) all over the track and especially to the outer track lane (due to the centrifugal force sending you out there) and validate it for the 'Stage animal'🏆 achi, then Share and use it in Time Attack (has to be shared for use on Time Attack).
Assuming the servers being dead: Quick Modes > Waypoint > 'Gas'n'roll' (02 Gas Station) is possibly your best alternative, as the waypoints refill your boost, and it was the longest one according to the leaderboards.