Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87f8e37f3edb6a89993f06e1b54b186121a18e3d9ae8a929b3c175401f1a5b3c' 
  AND token = 'a5/Avk6Quvl1lUIHQyEfFDsNy/l8zJuCQot+ENpemzs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00070

JSON explain

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