Preheat Air Fryer to 400˚F.
Lightly grease the air fryer basket with cooking spray.
Pat dry the salmon filets with paper towels; season with salt and pepper, and set aside.
In a mixing bowl whisk together the lemon juice, olive oil, mustard, garlic, thyme, and rosemary.
Spread the mustard mixture over the filets.
Lightly spray the tops of the salmon filets with cooking spray.
Transfer salmon to air fryer basket and cook for 10 to 12 minutes, or until cooked through. Salmon is cooked through when internal temperature registers at 145˚F.
DO NOT crowd the basket; cook the filets in batches, if needed.
Remove salmon from air fryer; transfer to a serving plate and let rest for about 5 minutes.
Garnish with parsley and serve with lemon slices.