Preheat oven on high broiler setting.
In a small bowl, combine mayonnaise, avocado oil, lemon juice, thyme, garlic powder, salt, and pepper and stir.
Place salmon skin-side down in a casserole dish.
Spread lemon thyme sauce over the top of the salmon, coating the top side evenly.
Place on the top rack under the broiler and cook for 5-7 minutes, until salmon flakes away from the skin.