Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1e91153c9348d9bd3eb99a6876d3b30ee5d368ec9fdff843d9f3885f7ba0b2f' 
  AND token = 'xISeNt6SwhYIWieH84S1GzogVY3G0EjP6BbKJTm/hew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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