Mix all the dry rub ingredients in a small bowl. Pat the chicken surface dry with a paper towel and coat the chicken with the dry rub seasoning. Let it sit for 45 minutes to 1 hour at room temperature.
Mix egg and water in a small bowl. In another bowl, combine the remaining crust ingredients. Coat the chicken with the egg mixture and then the flour mixture. Pat to remove excess flour from the chicken.
Heat the deep-frying oil to 350°F and cook the chicken, turning it a few times until the internal temperature reaches 175°F, which should take about 15 minutes.