Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c13d27909b8faaceb9b7923a0ee524c94a106027db76692173cfca3598ca6587' 
  AND token = 'qtFzYAoAuCVpCHBOxD5bnyvV0DGwRt6sWq2beElmuPE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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