Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69020afa23906654c02860196a6ec19f79313d35135bcf147fe768f766b98b24' 
  AND token = 'k4gUwFRB8UsEmDlOmphaCZYFNUiLwx44Bp1vaU8PIy8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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