Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b119172164b3757e14134b6f72d8c19df6164e2e3e016e3d8be909fa7d47f36' 
  AND token = 'FK7aMjkkeXfJ64o0nqxiK5qOGJrimSFMFvCB/5eW61Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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