Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f452ae587f0f1fced88455294be0658519e38b7cb87323e532acddbce76c9c5' 
  AND token = 'e/QtG072y2qvVuj/FItl9NRzoCo6zeWcx6DfP+5sDNU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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