Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b4a9f64a28e87d811f309ae42f2e5ada72244db76e3f38866128e6e3d0a7c3d' 
  AND token = '8b70h42viq0fPm/ZL/7EeWzRYwRuw02yNvB7jTITSVA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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