Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fb08797043094e915e270ba6f70ec9b0682a5326adc78b489f1edab924bdc4c' 
  AND token = 'duxCvPEazbZBDPaA7sw4BLyLpGOqJNbpviycOcopJKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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