Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '6696df30a3ebbb6dcb06f2730ef37cf516be83a1c70ba86052f5f905e0498eed' 
  AND token = 'K84SFOsXu000BDIRYHUzRHYmL0WZzaUrpkC0uu0ZPOk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00754

JSON explain

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