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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '22a685ad02a72641dca30fcb3dcc21b543ce3fe81ed8dee4b094c4adf14cd1ee' 
  AND token = '8hjzqOc7V76PcvNNB3ff6SuR6t8D8dpJpH/VrVhwaZ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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