Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f9068420c7de330785032edb3d934169e2e2d14de20e267bb30f64380029f0a' 
  AND token = '6zgRh+k8wXccLez5azO//BRM5S2UdTrCmlVomQlR00E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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