Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f3ded9602ee1a4f154d1c1ea4743657a6bb69d56f4a39dd2d2767985eadec69' 
  AND token = 'Ldc0KsLA95FrmPr/KktJILejRlx4kqPFgjR7UG/5Og8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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