Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3d3be77788749004e05682b8996e919bba8262f18c78a4cb1a54f7daf35cf39' 
  AND token = '/TaVchytGEd3/Illn/4Xo/zV1SKC8XcBUw4rwaOKQkQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}