Place the baguette slices on a baking sheet. Brush with olive oil, sprinkle with salt. Bake in an oven preheated to 220 ° C until golden brown, for about 7 minutes. Remove slices of bread from the oven and cool slightly.
In a bowl, combine shrimp, chives, parsley, pepper flakes, lemon zest, paprika, 1-2 tbsp olive oil and a pinch of cayenne pepper. Put the shrimps in a preheated pan and fry for 2-3 minutes. from each side.
Cover the slices of bread with the marinara sauce. Top with shrimp, drizzle with olive oil and sprinkle with chives.