SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20a836b8906257856e04c5ca73d2fb9804a7205631e7c479f924d3d19329380d' 
  AND token = 'UgIUXfamZXnl5zd9Q/+wetlQCmJ6HGPD43bmByQA74w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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