Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '713b7e04679dbc14815a05994a30de258802fa69bdaeb798f0daa5c1513123c1' 
  AND token = 'uYSzfat0STFK0Kne0eDh55NsHp8UovdgO/BrU1zvmfo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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