Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17586da461b6e8350ae8cac73ef2cdd7bcb504dd267da5208d9e8f47531106fb' 
  AND token = 'JYU6q8Px1CTXquevE2wzXrynBXSTUXjQuoM5NyI1qQQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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