Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f92dc5f178e040739afbaed77d4ab7e2dc827b8739d3309048ad35332a825bb' 
  AND token = 'DDzUUVv7XYZ2AP3gHSX//yoNbmNFEJO1qS7PZOgChmM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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