SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'be3f011964468d0596c01ef387fb67938f47e79ab19a5944ef7e9cfe35f2a449' 
  AND token = 'GkqzkPMWZmpx5vqawgPv1/vha27PnZgU+gxcTb1Bkh0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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