SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42d84fbe32aa27c3f80f1f60b842cc019e787e486ab2bd517eec5ae27ea68bde' 
  AND token = 'hJglDxr7wVuSA/HzVvBlgwo1LxK5PZKomXyWu/krNGI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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