Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19b0a668a2c16d001cee2766bd1c79f968a4a1eec17b107a34789b61f0c16467' 
  AND token = '26cdhMKFkkiZ8dWKlylFPwsj5f/vStqz1USgVTMRWPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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