Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c91f1c3a5fd6cb1d5b8a9f0a7a77c899464bce5a55eb85a4c70c88c34457fe0b' 
  AND token = '8hhbdz4VHTdxoHc7qWoSF8W3FsW0HrOJYF5HuyplNMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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