Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c1de382ed463bf76b4490cd3f33bbe4ff61d3f5f3ddb5e6edb5b110d87adf68' 
  AND token = 'uw+tFeajuXlM922ONNqYl2FuXlwTj8GpD6lJNrxtmrI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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