Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e61c7d6ffff5537c93078b5ec54eeab52124b653ce6a0db75afc122894757c9f' 
  AND token = 'f2K8UG7GZsDV6Z83IWCbFS/iBSjeBL0BQNe+VwWidnI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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