Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '52ac6ee75af45c668748e066196985ab8775146e5fd2437e2024e3f508773ba1' 
  AND token = '2zh6Zu8kIoPiA9dZM+yuITEaXO1drREWIkoCj/A+Etc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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