SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00aa910137e418c32afb9c7765546f853997bd96088fe8abad9e022cc85ee3db' 
  AND token = '2nwjlstYPETzvqpJGXxDcdbAgYu3OznhV9fssuURB4M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}