Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d71c1cc63ec8d8b7db502afd0d4b52767becd97b968e714be833c4d8b951e7f' 
  AND token = '6lXMWSpb1WmmpbgmjIygmqWd21fOFtCHSHpaRwnD61Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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