Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '8355a8df24cddc2b462fd83d8864ca4f10fa83f80c04f6893a8584d3674f7aaf' 
  AND token = 'DWDgh8lH+/Nrge2lO1hogxi7D4sW6cEEsJmmHTZPtmo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00748

JSON explain

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