Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4272e894f2b4e0df265454ee5cd0e470be2ed64ddf04c4d24cc1abadc0055d6' 
  AND token = '7TYc6OS3/x7hoZcWcIX9P/wCvIyNfmfOi4wkF8YVRs8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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