Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db89ace0443f2821985f1a5f542163c636129a06b9970ad225be8fd7a8149cb3' 
  AND token = 't9IAe5qmXvab9efcgUondtetVn4DtD9DB6/EffdZINM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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