Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bde0ae2a75acb78a1983e55b24087140754c789d64be55a90e726944cf85fac' 
  AND token = 'Ec7pd65BwDyw98sqmn5H/4hgN75Wxyxe+IxuhmNM+yA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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