Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0fc23ae950feebd8b3993c0d67ac1228440717af03a8ad1cefebf163333d8188' 
  AND token = '5m/GWn4yBGWXL2kibi2Ykl8eyCxUc12n9RV+X2evQPI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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