SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d93421a34194ab6b7cd18ef75544b53b69880536d95f1398b474e602a92ec3f' 
  AND token = 'pQKTssfGmLlha6eHOlbnq9dH0YQzd/2NX9ZoiHg4H+E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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