Preheat the oven to 350 degrees F (175 degrees C). Spray a baking sheet with cooking spray.
Put flour in a bowl. Put egg in a second bowl. Pour panko, red pepper flakes, chili powder, paprika, and chives in a third bowl with a lid; mix until combined.
Dip chicken strips in flour to dust them, then dredge in egg, making sure to let excess egg drop off, and then place in panko mixture. Cover with the lid and shake until chicken is well coated. Transfer to the prepared baking sheet.
Bake in the preheated oven until no longer pink in the center and the juices run clear, 10 to 12 minutes.