Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e03205e80a023daa424a24dfd5b9986ef334403d50ba12758c6b5acd0c4e218' 
  AND token = 'MyQw92eUaY5rzOYT+ZPhGC9P0RBRzwbVYs+BM3mPTc8=' 
  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"
    }
  }
}