SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca2a389d671fb87529e621a1e9b7f541be4cfc7927d70d7c9a0eec59a93a36d7' 
  AND token = 'V1lsqFgx5/iqMQiyqE7n+B9E7DGLZ7GjLwQhBKDRptU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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