Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13d7cb221a0493a1d1f12d133b840a53447fb5d7101a85422c26dfe757e47003' 
  AND token = 'i/4vvLXkiknLisgbLDnEZJJBvDL3utoWZgOGbQSOIao=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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