Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '75f9dfc86e1d5d0a83b561ac36deddad0b5d824768650fde955fbd4d760b668a' 
  AND token = 'NzZm4uH9RU0MPRZXMK2j66Ao+YP2fzCAqfuEDAQcIsU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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