《叶问》第28期，表里某个字段，同时创建了索引和直方图，执行计划会怎么选择

"considered_execution_plans": [
 {
   "table": "`t1`",
   "chosen": true,
   "plan_prefix": [],
   "cost_for_plan": 0.35,
   "rows_for_plan": 1,
   "best_access_path": {
     "considered_access_paths": [
       {
         "cost": 0.35, cost这个就非常低，所以毫无悬念的选择索引
         "rows": 1,
         "index": "k1",
         "chosen": true,
         "access_type": "ref"
       },
       {
         "cause": "heuristic_index_cheaper",
         "chosen": false,
         "access_type": "range",
         "range_details": {
           "used_index": "k1"
         }
       }
     ]
   },
   "condition_filtering_pct": 100
}