Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0b1691c93f7eff88d461e25cf855c77b539c8c21930046c144335741535fef34' 
  AND token = 'KmXivliNzU69dl4iFbY8YvbdnMsChzhFfQzYxAXFTvs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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