Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd45c46ec3f0e31a25fc538b8966d46833059a3e8eeb20e44ee232b494ae1619' 
  AND token = 'eJN000VfWwfgp2W7AK1/nDX8NVAKl9U4RKS/ilRoYuA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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