Make your spice rub by mixing the salt, garlic powder, onion powder, paprika, cayenne pepper, and black pepper together until well combined
Sprinkle the dry chicken wings (pat them dry) on both sides with the spice mixture
Brush the chicken wings with the mustard until completely covered
Dust each chicken wing with flour to coat completely
Heat the oil in a Dutch oven or a deep fryer. When the oil is hot (sprinkle a bit of flour, and if it bubbles, it’s hot enough), fry the wings for 6 minutes on each side or until the juices run clear. Drain on paper towels.