Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5dae7bd7b2fdb74cfccd41d457345fe365dd79edf5dc820716d351b225067cfa' 
  AND token = 'NPZBgLf3lrOBOOrSiXuk8qqZU+ykcIkJaQcoXLr4rug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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