Peel and cut carrots into 1-inch diagonal slices (make sure to slice carrots about the same size so they will cook evenly).
In a large bowl, toss the carrots with melted butter and brown sugar.
Spray the air fryer basket with olive oil and add the coated carrots to the basket. Spread out the carrots to cover the surface of the basket.
Cook for 10 minutes at 400 degrees Fahrenheit, shaking the basket after 5 minutes to rotate the carrots so they will crisp up on both sides.
Place the cooked carrots in a bowl (take them out using tongs so the caramelized brown sugar below the grate doesn't spill out into the bowl) and toss with maple syrup, honey and a pinch of sea salt.
Sprinkle with fresh parsley and serve.