Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b5bbf86872943d3abeb29320b609d114ab39c56e4b4da6a3882ef537efc5d59' 
  AND token = '/z4Z0fpsyzWpj9Cf4VE8uC6nn+I7znZYoft3n9HkOCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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