In a small bowl, mix together garlic powder, onion powder, paprika, salt, and black pepper.
Rub the spice mixture evenly over both sides of each chicken breast.
Heat olive oil in a skillet over medium-high heat. Sear the chicken breasts for 2 minutes on each side until lightly browned.
Place the seared chicken breasts in the bottom of the crock pot.
Pour the chicken broth and lemon juice over the chicken breasts.
Cover and cook on low for 4 to 5 hours, or until the chicken is tender and cooked through (internal temperature should reach 165°F).
Remove the chicken breasts from the crock pot and let rest for 5 minutes before serving.