Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84fa7e97418340da2535a976ab0e6721d0991f3682e7576a79f940558bf5aaa5' 
  AND token = 'XBPJ+snxXK6y3XPrsoFL14olAt2vpg9EcO7TUsYrmTw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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