SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbd07df8d524bf6b8148d1f5012ba82faf86c9e38fa9d499b2ad01d666095922' 
  AND token = 'MJnExG/7lUhANHtNdVhhGDAbs7l9ID+qJOytAZ4zXFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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