Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'fdf0479e5f62a0d01a5278cd50b6fd01101c2946e4504c3e76df43e118972271' 
  AND token = 'EfbvlJ97kLx+UxcD5DN8T9GY5QNH1PdzehL/FVcnV6w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00800

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}