Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83eb01a30128cfd1edb3858731a8ee8c28fa86be20c912e0f0784c641a75f13e' 
  AND token = 'bwCno+9NJkaYa0yNmICmNSxmfJ1ixbKC/fhci+Rwqu8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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