Heat oven to 425°F. Lightly oil a 9x13-inch baking dish.
Pat chicken dry and arrange in the dish. Season both sides with salt and pepper.
Stir together mayonnaise, Parmesan, garlic powder, onion powder, paprika, and lemon juice until smooth.
Spread the mayo-Parmesan mixture evenly over the tops of the chicken.
Sprinkle panko over the coating and press gently so it adheres. Drizzle with olive oil.
Bake until the chicken hits 165°F in the thickest part, about 22–26 minutes.
Broil 1–2 minutes to brown the crumbs if desired. Rest 5 minutes, then garnish with parsley and serve.