Combine the flour, paprika, onion powder, thyme, oregano, cayenne, salt, and black pepper in a small bowl and whisk them well.
Coat both sides of the cod fillets evenly with the seasoned flour mixture.
Heat 1 Tbsp of butter together with the olive oil in a non-stick skillet on medium-high heat until melted.
Place the cod fillets in the skillet and cook for about 3 to 4 minutes on each side until they are nicely browned and flake easily with a fork.
Transfer the cooked cod to plates and set aside.
Lower the heat to medium-low and melt the remaining 4 Tbsp of butter in the same skillet.
Add the minced garlic to the skillet and cook briefly for about 15 seconds, just until aromatic and slightly colored but not browned.
Remove the skillet from heat and slowly stir in the chicken broth and lemon juice, being cautious of the steam.
Pour the lemon butter sauce over the cod fillets and garnish with chopped fresh parsley immediately before serving warm.