Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afc6a524f02713f08e9a90769e2346889d4ee27d6f1a0086c4ca459066931dba' 
  AND token = 'fwOTzlTS4Z1mSyzc7ya5PTNQoxUlKAzbEUW21nh/wY4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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