Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd9321c0dcf0c7a64a36e29881784c41ed0d104221b61b9162475afef68c6506' 
  AND token = 'NWz1Oh6hcBKFfXXM+Jbxb54vZoS/xD3UOJAi74fEUnA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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