Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '954a467d210ac98940bc7a4cdec68ba66f77212d0c5aa70ef51cea9c3a330c5d' 
  AND token = '3QHv1yqwH37Y0DxA+kA+9rzNbZJNUa6nVqZ/NLHuMJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00062

JSON explain

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