Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44e3cfb81b2f2434b09965fac913a8faa0ab656084a1a8270578bb8f3239b84b' 
  AND token = '1OUe/OV8qoY/yZ9yjHQ849ZGMP8djaoss0h7Sp8saXU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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