On a scale of 1 to 5 in terms of spice levels, I would place it at 2.5. You can add or reduce the amount of Serrano peppers as per your heat tolerance.
Keyword Cilantro Indian Salad, Cucumber Indian Salad, Cucumber Salad Indian, Cucumber Tomato Cilantro Salad, Kheera Tamatar Salad, Spicy Salad