Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '862a618a57ed07ef3025f27d03e1a36326aeb35a784388c11d74a2522c947b0c' 
  AND token = 'llN9uaIV2a7sFhNnZqo6nehiHiYXF5CNl9r7WZ/O1oM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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