Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40922a74056f7cd72c6bccb759308ffac26737465ae1677e50103877c5ed5948' 
  AND token = 'JXXBU+eIGe9uC4ubHwyBzbB1cxX9cWUntpgSmQwjRJ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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