Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88c7a75014e57d5d86d606febcc7906ecbb68bc53b518d924f1fc5748d63a20a' 
  AND token = 'y/x0pMXd3kazROWXjCz1eNmsHS2CVbdjqKJuRv/4fdk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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