Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e9993a8d42e81789da68295af539c81019ebda821e6e3e5000cd85619ceaada' 
  AND token = 'Fy5iJ1RSSjYdzrZMDxmoZB/knGeT1iPQyLTC81pL5nk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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