Depends on how many carbs you want...
Egg mayo - I chop up a couple of eggs, mix a spoonful of mayo (Sainsburys organic is the lowest I have found) a few chives or chopped spring onion and a couple of cherry toms.
Avocado and walnut - mixed in with full fat cottage cheese, some spring onions or chives and the juice of a lime
humus and carrot sticks or cucumber, so long as you can tolerate them
stilton and cucumber chuncks
home made fritatta (asparagus is in season!)
left overs from last night that you can heat up in the microwave
pizza - there are some good low carb recipies, there is a nice pizza "crust" in the Low Carb gourmet
M&S do some nice pre-prepared salads with nice dressings in the salad section NOT the lunch section
I love salads. However, if you have mixed feelings about them consider what kind of salads you are eating. I like colourful strong flavours. There is a mixed rocket, spinach and watercress pre-prepared salad, a lovely bistro salad with grated beetroot in most supermarkets.
I make a Greek style salad - various chopped raw veg including cucumber, cherry toms, red, yellow and green pepper, spring onion with olives and a lemon juice and olive oil dressing and crumbled feta cheese, but you could add another protien source.
The thing with salad is learning to make a decent dressing. If you like mayo, learn to make your own or experiement with different brands as the flavours vary a lot - as do the carb content. I do use some slightly carbier ingedients in my dressings, including balsamic vinegar and honey, but it is a flavouring and does not significantly add to the carbs in the quantity used.
Experiment with differnt oils such as olive oils, truffle oil, nut oils like walnut and differnent vinegars like cider vinegar and wine vinegars. Learn to make infusions of both oil and vinegar. Fresh tarragon or raspberries in vinegar, garlic and chilli in oil. Experiement! Keep it simple.