Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '110bf80f24000e0061d3c032bc715c986788b8a816820912883e7ee81eacd7f4' 
  AND token = '7riaqTb3Na10yzsju5xbkd4kf6XN8PdMnJ5GI3ad4s8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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