Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '50a09ef13c0ab2ae2a567942e04cea2329bf001d4c3047a99e4130aac47fb3b2' 
  AND token = 'e4pahex3JnjMO/KZGKwLqusy7FzVRRIGfRmAkznzgkY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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