Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b2e4f444c676081b8ce842d1ddbd8695e4fd71fc958a196ca0fc547caf30f0e' 
  AND token = '5IidoWO6GhkkFZd0B3Sm8qJkH5iWKgMBQ/YH7qAcqRA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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