Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb3fc5496c3a15729fdef72a9e02947984ba8f6e193f0dd11cd299da0603ec18' 
  AND token = 'tq4Weoc9mAIKG8+2weXElqT9ujVsGNO7ji7RekGUaB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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