Preheat your oven to 400°F (200°C).
In a mixing bowl, combine garlic powder, onion powder, smoked paprika, thyme, sea salt, and black pepper.
Pat the chicken breasts dry with paper towels.
Arrange the chicken in a baking dish and drizzle olive oil over the top.
Sprinkle the spice mixture generously on both sides of the chicken.
If desired, add a splash of lemon juice.
Place the dish in the oven and bake for 20-25 minutes, or until the chicken reaches an internal temperature of 165°F (75°C).
Remove the chicken from the oven and let it rest for about 5 minutes before slicing or serving.