Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8befdf19b6ed1d6b7f38bb873e9ef2a2e17b08c1b08a39a8a420e48024dc64e1' 
  AND token = 'rwDk2MFparHOy3V3odUd7ufUB60Fw/M7K1IW/Wm/Z/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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