Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6cd131b007bd33f43d28c060d90ba55ad0774ea6d4cd6572bce02c62c0395f86' 
  AND token = 'jyRoMQiK8vic0PE4yTTs51Kal53JROHPQFO2Bl3mPew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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