Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34ceaa15326d086e079575972743bdc9abf8f5b5b634520c6075e97ebf278dde' 
  AND token = 'OFvm7Ld+oSw88rR9ZyKV0BNN2QWSHy86qhR+oExfDEw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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