Yes your cholesterol is high, so the question is whether u need to use any medications or not, if this is the first time I would recommend lifestyle modifications like exercise and decrease oil consumption and avoid refine oils and repeatedly used oil like fried items.
While coming to ur doubt of whether u had any plaque or not, it really doesnt matter if ur not symptomatic, concentrate on living clean.
If u really want to know ur plaque burden u can get CT CORONARY
CALCIUM SCORE -->CT CAG