Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2dfcc3ccf4077d9137f810121b0e056fdd407fe4b135ab1f922d9ad1d83eb98' 
  AND token = 'BJDlIDY78OYy5ITpouXkR9E9xuKLICB75Ns7/xQge9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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