In a large bowl, combine 2 tablespoons of olive oil, 1 tablespoon of lemon juice, 2 tablespoons of Cajun seasoning, 1 teaspoon of garlic powder, 1 teaspoon of paprika, 1/2 teaspoon of cayenne pepper, and salt and black pepper to taste.
Add the chicken drumsticks to the bowl and toss them until they are evenly coated with the marinade.
Cover and refrigerate for at least 30 minutes, or up to overnight for more intense flavor.
Preheat your air fryer to 375°F (190°C) for about 5 minutes to ensure it is hot enough to cook the chicken evenly.
Lightly spray the air fryer basket with cooking spray to prevent sticking.
Arrange the marinated drumsticks in a single layer in the basket, making sure not to overcrowd them. Cook in batches if necessary.
Air fry the chicken drumsticks for 25-30 minutes, turning them halfway through the cooking time to ensure they cook evenly on all sides.
The chicken is done when it reaches an internal temperature of 165°F (74°C) and the skin is crispy and golden brown.
Once cooked, remove the drumsticks from the air fryer and let them rest for a few minutes before serving.