Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61d313d46fbe85d35e45aaadebc88539048e54dcbcc0ab66fd83e1f8a8bad209' 
  AND token = 'iRRIrrzIUFudPBzJTmLxc8peUCIeNhodCOWxSE6v5t0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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