SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2673df870e2a4997e70d47688397d51506ea0b7f1b61953496ba88127fba7e6f' 
  AND token = '9GL2nxZmViTfI+ViogP1zuOjUQrs9H1XGjQAZ4GYZTw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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