Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11e7c1d0214e0e917d0a2fd3d0c6542c8cb4ef49657a7f8166d4b9ed09155099' 
  AND token = '+lPTUVtQBsrw8FbZUM69MQEHPIr+KnmM4iGAom+ej+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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