Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d28fa19923b598055b42997cdd4eeb25705b67bff90a1d59382b4b1ae6052f8' 
  AND token = '3HBcMEcUhl558+IBxrBs/6Cf6+gDQG1hePOJDLkhw3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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