Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0371aee8ea3e96fdbe8412ba70da91afb583f2b334985d159ed0ba2a9c3b67a7' 
  AND token = 'Teb3HktUphMOMFjFU5Hig8j1KSV0etd4RL91DTvYx4w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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