Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '6116ea877eb746c56f3c29b5aa6b999898cfa4c7e5f2e7499168f9a62d6f4d60' 
  AND token = 'YrnalZ26gDXHGy+E7SJGc2B3dr9Tc0Is99htj5YlGlU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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