Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '474832e826f966838120766c8dfe90f91278df7dedd6ae7f8a8371412d7da4a8' 
  AND token = 'ORNQRXOi0e5WM5f4GzG5ow5TCQwZbx+Ni7MiLjtUHh0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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