Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61bcec7f1234d241bdd21e05369faf6a13580ab1d46cfe37b42d6011d64c7804' 
  AND token = 'Ot5ao6lEtzP2Qwt0ypbAyUBqy+WLv7oztEK3JENCeXM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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