Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fe7c8da210547b65f6a52c1ea84dbe7cffb9ff1fe14d63c9d177bd8a9b8e46c' 
  AND token = '6fmJeN3JZZGOiBmdv1nHjN0l+kzE+26Msm6ejWqQDKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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