Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '066c820784c6f533cf3c953d7e98507278713d06bd35dd04f120d92c744bddda' 
  AND token = 'dPShyieD5926hBLsFFCXgUdmCi0ZOBS0A2CLlkYXHcg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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