In a bowl, whisk together olive oil, soy sauce, honey, garlic powder, paprika, black pepper, salt, and lemon juice.
Place chicken thighs in a resealable bag or shallow dish. Pour marinade over them. Toss to coat and marinate in the fridge for at least 30 minutes (or up to 24 hours).
Preheat your grill to medium-high heat. Lightly oil the grates.
Grill the chicken thighs for about 6–7 minutes on each side, or until the internal temperature reaches 165°F.
Let the chicken rest for 5 minutes before slicing or serving. Serve warm with your favorite sides.