Add chicken breasts to a medium pot and season with kosher salt and black pepper. Cover with at least 1 inch of water and bring to a boil. Once boiling, cover with a lid, reduce heat to low and let simmer for 15-20 minutes until chicken reaches an internal temperature of 165°F.
Transfer cooked chicken to a large bowl or the bowl of a stand mixer and shred the chicken using the mixer or two forks.
In another large bowl, whisk together Greek yogurt, lime juice, ground cumin, chili powder, smoked paprika, salt, black pepper, and cayenne if using.
Add shredded chicken, black beans, red bell pepper, corn, red onion, and cilantro to the yogurt mixture. Stir until combined. Taste and adjust seasoning as needed.
Refrigerate the chicken salad until chilled and flavors meld together.
Serve on whole wheat toast, with tortilla chips, on a rice cake, or wrapped in a tortilla. Enjoy!