Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '537e45e0c006b91a9d2919411789a98dfb4babb0538d0d910815b9e48be876c1' 
  AND token = 'KXv37OxLaocHD7b2jjmydiXFkyg+p54zcZLcvWn5xjw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00760

JSON explain

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