Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd654a59f9780ce7fcc3ce9e76556d123712ecfa1630937ebdb62c1ee1e24af2' 
  AND token = '46b+lxc19dS6rv3mx+SLrHhnLqDm+eP7oZPVtb1/UAk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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