Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b9f20b92b2957b648478c9429699403c767365209f436cda1e42175933241d4' 
  AND token = 'uC+mh348CFIFMjEU3My54WOCzCqAQrmWoPhjyEydbw8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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