Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f4ada0d46ff7d162ade8db99ce86cc43cce54b5c3315d9ff531bf35055cf0ef' 
  AND token = 'DaNFlXqCllVGVV8yjh6VzUU+r4UEe3SAyH5fUmqHUvc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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