Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db700c2198eff1001be64bcab2ff2f36127b49b13db30168e49e47e138fb8ee6' 
  AND token = 'JsOKAboQ6pGutknWDYIrMrzdmaGsRJ+vSlTW4l5eXc0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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