SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60e2087572135c7f93e49af8e80ce9ce22a2772618f0bfdf1797bb6fc193fd7f' 
  AND token = 'Nt8OYQprlzFPKqxwYeLgfnCRCwB1P/YU0hS77pdBUvs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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