Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1172e8fd3f1824a90b6b2a3732fc826d5454d50556022c29b220c5340757d899' 
  AND token = '/Gm9nHE0PtVg7BZ6flrVtGUWxlU3RNSNv5SQfS9UQqo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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