Peter of Detectives beyond Borders reminded me that there is an award for translators. The Duncan Lawrie International Dagger is awarded by the British Crime Writer's Association for translated crime fiction.
But this is a joint award for both author and translator of a specific book and the author gets top billing, both literally and financially.
Past winners of the International Dagger have been:
2006 Fred Vargas and Sian Reynolds for The Three Evangelists
2007 Fred Vargas and Sian Reynolds for Wash This Blood Clean From My Hand
There should be a separate award for a body of work, or a lifetime achievement in translating such as the Cartier Diamond Dagger of the CWA, The Eye of the Private Eye Writers, or the Grandmaster from the Mystery Writers of America.