Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '945701477353995a8fd38f34fd5980f90ad0241b9ffa0d367cea6110d7222831' 
  AND token = 'xmwugK/JoX6uExTAsFfmRXUbx0adIfB19cd1lWPVhPI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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