Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '239e31087b3d4afcffc24e9e87dcd9c50519cef8bf3c0b49b3daca8c43ea6ba7' 
  AND token = 'MAr2GxjcG+PtODldtTHXK/OEi55v3o11wldGO1XDhBc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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