Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e338b4602afc8de3750cb6d89b1d2a73b67e744b1db078d401adf4f9ba5293ec' 
  AND token = 'H/YNDJ4k70W49QeKLAEo4Dxd18hFqmM3eXMtoMhLAjQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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