Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '086d77120e3a02a4453a3709630423df9e88174e049d6c1608ca91ad4e6e0e38' 
  AND token = 'N1ocIqNU3TgHJGHZC7QBXepi71Z2a/UAykctuj/w3/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00772

JSON explain

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