Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '799258ec81af34180d03956f7eb4e7b51acd84812c5053c7a826d39405f9c1f8' 
  AND token = 'TyiE3zgkNCDEt2GdEGFZsVSWNVdFknlWFG/1cvUvk84=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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