private static bool IsEntryExpired(FbConnection connection, FirebirdStorageOptions options, int entryId)
 {
     var count = connection.Query<long>(string.Format(@"
         SELECT COUNT(*) FROM ""{0}.COUNTER"" WHERE id = @id;", options.Prefix), 
         new { id = entryId }).Single();
     
     return count == 0;
 }