Prepare the sauce:
In a bowl, whisk together mayonnaise, honey, barbecue sauce, mustard, and lemon juice. Cover and refrigerate.
Cut and brine chicken:
Cut chicken into 2-inch pieces. Mix cold water, 1½ tablespoons salt, and Worcestershire sauce until dissolved. Add chicken, cover, and refrigerate for 30–60 minutes.
Prepare coating:
In one bowl, combine flour, breadcrumbs, remaining salt, onion powder, pepper, garlic powder, and baking soda. In another bowl, whisk egg whites until foamy.
Heat oil:
Heat oil in a deep pan to 350°F (180°C).
Coat chicken:
Remove chicken from brine and pat dry. Dip in egg whites, then coat thoroughly in the flour mixture.
Fry:
Fry in batches for about 4 minutes, turning occasionally, until golden brown and crispy.
Drain and serve:
Place on a rack to drain excess oil. Serve hot with the sauce. Enjoy your Crispy Chicken Nuggets.