Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25baea2fa0154964241e291d2e0054cf613d4232ceb260b5511edb5cba95d362' 
  AND token = 'VuLRBGZEkOb8wIwsUrhytY0KWyQUuK+XEfwofSRjoNY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}