Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56ead410813bde2e46d618e765b8a5cd818ce6dfc18be1ca7e0e8c7d9883082c' 
  AND token = '4JZD/vjg87YqL8zN8glA2q8V1Qwn3Udzskm/JKfHIxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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