Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a70d517b2426c1e8befbed9b0118aa96688a51b2123b4ba9d4b0d9f64ba9b934' 
  AND token = 'uXkBrMqRloeFJ5wBT/RJipwcDFmSfYzyBROCdGlW62Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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