Rinse rice and cook in salted water or broth — bring to boil, reduce to lowest heat, cover and cook 15 minutes. Rest covered 5 minutes then fluff.
Pat shrimp completely dry. Toss with paprika, garlic powder, salt, pepper, and red pepper flakes.
Heat oil in a large skillet over medium-high. Sear shrimp in a single layer for 1 to 2 minutes per side until pink and just cooked through. Remove to a plate.
Reduce heat to medium. Add butter to the same pan. Scrape up any fond. Add garlic and cook 60 to 90 seconds, stirring constantly, until fragrant and just lightly golden.
Add lemon juice, lemon zest, and broth. Simmer 1 to 2 minutes until slightly reduced and glossy. Taste and adjust seasoning.
Return shrimp to the pan. Toss gently for 30 to 60 seconds until coated and heated through. Add parsley and chives and toss once more.
Serve over fluffy rice. Spoon all sauce generously over the top. Garnish with extra parsley and lemon wedges. Serve immediately with crusty bread.